In this paper, a novel multi-functional terahertz beam splitter model is proposed. Under the normal incidence of a 2.52 THz light wave, the hybrid metamaterial can implement ultra-uniform two- (1st), three- (0th, 1st), four- (1st, 2nd) and five-port (0th, 1st, 2nd) output for both transverse electric (TE) and transverse magnetic (TM) polarizations at different optimal structure. The efficiencies of each diffraction order are greater than 49.4% (two-port), 32.9% (three-port), 23.5% (four-port) and 19.5% (five-port). The electric field distribution of the metamaterial microstructure is calculated by finite element analysis, which can help understand the propagation process and mechanism of the light wave in a grating structure. In addition, for the sake of practical production and application, the incident wave band and structural parameters of the four kinds of splitter devices are analyzed.

在本文中，提出了一种新型的多功能太赫兹分束器模型。在2.52 THz光波的法向入射下，混合超材料可以实现超均匀的二(1st)、三(0th、1st)、四(1st、2nd)和五端口(0th、1st、2nd) ) 输出在不同最佳结构下的横向电 (TE) 和横向磁 (TM) 极化。每个衍射级的效率大于49.4%（二端口）、32.9%（三端口）、23.5%（四端口）和19.5%（五端口）。通过有限元分析计算超材料微结构的电场分布，有助于理解光波在光栅结构中的传播过程和机理。此外，为了实际生产和应用，